The best-laid plans of Mellon Financial just aren't good enough when it comes to returns, analysts argue, but Martin G. McGuinn, Mellon's chief executive, claims his company just needs more time to grow.

"On paper and conceptually, they are doing a lot of the right things.  In some cases execution of that strategy could not have been better," Kyle Cerminara, an analyst with T. Rowe Price, told The New York Times. T. Rowe Price holds a large stake in Mellon.

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